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/*
* MinizipExtensions.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#pragma once
#ifdef USE_SYSTEM_MINIZIP
#include <minizip/unzip.h>
#include <minizip/zip.h>
#include <minizip/ioapi.h>
#else
#include "../minizip/unzip.h"
#include "../minizip/zip.h"
#include "../minizip/ioapi.h"
#endif
// system zlib on old Androids isn't capable of using _64 functions: https://github.com/madler/zlib/pull/436
#if defined(__ANDROID_API__) && (__ANDROID_API__ < 24)
#define MINIZIP_NEEDS_32BIT_FUNCS 1
#endif
VCMI_LIB_NAMESPACE_BEGIN
class CInputStream;
class CInputOutputStream;
class CMemoryBuffer;
class DLL_LINKAGE CIOApi
{
public:
virtual ~CIOApi() = default;
virtual zlib_filefunc64_def getApiStructure() = 0;
};
///redirects back to minizip ioapi
//todo: replace with Virtual FileSystem interface
class DLL_LINKAGE CDefaultIOApi: public CIOApi
{
public:
zlib_filefunc64_def getApiStructure() override;
#if MINIZIP_NEEDS_32BIT_FUNCS
zlib_filefunc_def getApiStructure32();
#endif
};
///redirects all file IO to single stream
class DLL_LINKAGE CProxyIOApi: public CIOApi
{
public:
CProxyIOApi(CInputOutputStream * buffer);
~CProxyIOApi() override;
zlib_filefunc64_def getApiStructure() override;
private:
CInputOutputStream * openFile(const boost::filesystem::path & filename, int mode);
CInputOutputStream * data;
static voidpf ZCALLBACK openFileProxy(voidpf opaque, const void * filename, int mode);
static uLong ZCALLBACK readFileProxy(voidpf opaque, voidpf stream, void * buf, uLong size);
static uLong ZCALLBACK writeFileProxy(voidpf opaque, voidpf stream, const void * buf, uLong size);
static ZPOS64_T ZCALLBACK tellFileProxy(voidpf opaque, voidpf stream);
static long ZCALLBACK seekFileProxy(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin);
static int ZCALLBACK closeFileProxy(voidpf opaque, voidpf stream);
static int ZCALLBACK errorFileProxy(voidpf opaque, voidpf stream);
};
///redirects all file IO to single stream read-only
class DLL_LINKAGE CProxyROIOApi: public CIOApi
{
public:
CProxyROIOApi(CInputStream * buffer);
~CProxyROIOApi() override;
zlib_filefunc64_def getApiStructure() override;
private:
CInputStream * openFile(const boost::filesystem::path & filename, int mode);
CInputStream * data;
static voidpf ZCALLBACK openFileProxy(voidpf opaque, const void * filename, int mode);
static uLong ZCALLBACK readFileProxy(voidpf opaque, voidpf stream, void * buf, uLong size);
static uLong ZCALLBACK writeFileProxy(voidpf opaque, voidpf stream, const void * buf, uLong size);
static ZPOS64_T ZCALLBACK tellFileProxy(voidpf opaque, voidpf stream);
static long ZCALLBACK seekFileProxy(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin);
static int ZCALLBACK closeFileProxy(voidpf opaque, voidpf stream);
static int ZCALLBACK errorFileProxy(voidpf opaque, voidpf stream);
};
VCMI_LIB_NAMESPACE_END
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